/Engine/Plugins/Runtime/MeshModelingToolset/Source/MeshModelingTools/Public/EditMeshPolygonsTool.h
Bevel the edge loops around the selected faces, inserting edge-aligned faces that interpolate the normals of the selected faces
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(CallInEditor, Category=FaceEdits, Meta=(DisplayName="Bevel", DisplayPriority=4)) void Bevel()